At least four oil tankers laden with Russian crude are waiting off India’s western coast, as the Asian country’s purchases of the commodity come under the spotlight amid pressure from the US and European Union.

At least two vessels loaded with Russian oil bound for refiners in India have diverted to other destinations following new U.S. sanctions, trade sources said, and LSEG trade flows showed.

Rubio called India an "ally" but noted that Delhi's Russian oil imports were hampering its relationship with Washington.